Combination lock



FIG. 1 is a perspective view of a combination lock showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a let side elevational view thereof, the right side elevational view being a mirror image thereof; and,

FIG. 5 is a top plan view thereof, the bottom plan view being a mirror image thereof.

The broken lines are for illustrative purpose only and no part of the claimed design. 

The ornamental design for a combination lock, as shown and described. 